APA (7th ed.) Citation

Fitting, H., Heinrich, S., Jost, L., & Karsten, G. (1921). Strasburgers text-book of botany (5th ed.). Macmillan.

Chicago Style (17th ed.) Citation

Fitting, Hans, Schenck Heinrich, Ludwig Jost, and George Karsten. Strasburgers Text-book of Botany. 5th ed. London: Macmillan, 1921.

MLA (9th ed.) Citation

Fitting, Hans, et al. Strasburgers Text-book of Botany. 5th ed. Macmillan, 1921.