APA (7th ed.) Citation

Friedrich, W. (1988). Vitamins. de Gruyter.

Chicago Style (17th ed.) Citation

Friedrich, Wilhelm. Vitamins. Berlin [u.a.]: de Gruyter, 1988.

MLA (9th ed.) Citation

Friedrich, Wilhelm. Vitamins. de Gruyter, 1988.

Warning: These citations may not always be 100% accurate.