Cita APA (7th ed.)

Hey, D. H., & John, D. I. (1973). Amino acids, peptides, and related compounds,. Butterworths; University Park Press.

Cita Chicago (17th ed.)

Hey, D. H., i D. I. John. Amino Acids, Peptides, and Related Compounds,. London, : Baltimore,: Butterworths; University Park Press, 1973.

Cita MLA (8th ed.)

Hey, D. H., i D. I. John. Amino Acids, Peptides, and Related Compounds,. Butterworths; University Park Press, 1973.