Cita APA

Richards, M. B., & Simpson, B. W. (1934). The curative method of vitamin A assay.

Chicago Style Citation

Richards, Marion Brock, i Beatrice Weir Simpson. The Curative Method of Vitamin A Assay. 1934.

Cita MLA

Richards, Marion Brock, i Beatrice Weir Simpson. The Curative Method of Vitamin A Assay. 1934.