APA-čujuhus (7. p.)
ebrary, Inc, Whitley, B. L., & Thornton, S. H. (2012). Tryptophan: Dietary sources, functions and health benefits. Nova Science Publishers.
Chicago-čujuhus (17. p.)
ebrary, Inc, Blake L. Whitley, juo Sarah H. Thornton. Tryptophan: Dietary Sources, Functions and Health Benefits. Hauppauge, N.Y.: Nova Science Publishers, 2012.
MLA-čujuhus (9. p.)
ebrary, Inc, et al. Tryptophan: Dietary Sources, Functions and Health Benefits. Nova Science Publishers, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.