APA (7th ed.) Citation

Groth, B. H. (1911). The sweet potato. Univ. of Pennsylvania [u.a.].

Chicago Style (17th ed.) Citation

Groth, Benno H. The Sweet Potato. [Philadelphia u.a.]: Univ. of Pennsylvania [u.a.], 1911.

MLA (9th ed.) Citation

Groth, Benno H. The Sweet Potato. Univ. of Pennsylvania [u.a.], 1911.