A How to calculate Feynman amplitude in Fish diagram

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The discussion focuses on calculating Feynman amplitudes for specific diagrams, particularly in the context of quantum field theory (QFT). The user seeks study materials that provide a step-by-step approach to this calculation, especially for cases involving scalar, fermion, or gauge boson particles. Recommendations include QFT textbooks such as Srednicki and Peskin & Schroeder, with a specific reference to a section in a lecture note on simple φ^4 theory. The user is looking for resources that can enhance their understanding of the process. Overall, the conversation emphasizes the need for structured learning materials for Feynman amplitude calculations.
Alpha2021
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I am familiar with the process of calculating cross sections using tree-level Feynman diagrams. Currently, I'm keen on learning how to calculate the Feynman amplitude for a specific diagram displayed in the attached images. I'm wondering if there are any study materials available that offer a step-by-step approach to comprehending and calculating this particular process. Specifically, I'm interested in cases where x_3 and x_4 can be either scalar, fermion, or gauge boson particles.
hqbc.jpg
vqvxq.jpg
 
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Any QFT book, like Srednicki or Peskin & Schroeder
 
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