NEW METABOLITES OF PHENYLALANINE.

MLA

Loo, Y. H., and P. Ritman. “New Metabolites of Phenylalanine.” Nature, vol. 203, Sept. 1964, pp. 1237–39. EBSCOhost, https://doi.org/10.1038/2031237a0.

APA

Loo, Y. H., & Ritman, P. (1964). New Metabolites of Phenylalanine. Nature, 203, 1237–1239. https://doi.org/10.1038/2031237a0

Chicago

Loo, Y H, and P Ritman. 1964. “New Metabolites of Phenylalanine.” Nature 203 (September): 1237–39. doi:10.1038/2031237a0.