APA استشهاد

Langel, U. (2010). Introduction to peptides and proteins. CRC.

استشهاد بنمط شيكاغو

Langel, Ulo. Introduction to Peptides and Proteins. Boca Raton: CRC, 2010.

MLA استشهاد

Langel, Ulo. Introduction to Peptides and Proteins. CRC, 2010.