APA (7th ed.) Citation

Widnell, C. C., & Pfenninger, K. H. (1990). Essential cell biology. Williams & Wilkins.

Chicago Style (17th ed.) Citation

Widnell, Christopher C., and Karl H. Pfenninger. Essential Cell Biology. Baltimore: Williams & Wilkins, 1990.

MLA (9th ed.) Citation

Widnell, Christopher C., and Karl H. Pfenninger. Essential Cell Biology. Williams & Wilkins, 1990.