Gaya APA
Schwinger, J, S. (1988-1989).
Particles, sources, and fields / Julian Schwinger .
Redwood City, California:
.
Gaya MLA
Schwinger, Julian, Seymour.
"Particles, sources, and fields / Julian Schwinger".
Redwood City, California:
,
1988-1989.
Textbook.