APA (7th ed.) Citation

Engler, A., & Diels, L. (1907). Crassulaceae africanae ([Sonderdr.].). Schweizerbart.

Chicago Style (17th ed.) Citation

Engler, Adolf, and Ludwig Diels. Crassulaceae Africanae. [Sonderdr.]. Stuttgart [u.a.]: Schweizerbart, 1907.

MLA (9th ed.) Citation

Engler, Adolf, and Ludwig Diels. Crassulaceae Africanae. [Sonderdr.]. Schweizerbart, 1907.

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