APA (7th ed.) Citation

Engler, A., & Krause, K. (1912). Araceae - Philodendroideae - Philodendreae. Wilhelm Engelmann.

Chicago Style (17th ed.) Citation

Engler, A., and K. Krause. Araceae - Philodendroideae - Philodendreae. Leipzig: Wilhelm Engelmann, 1912.

MLA (8th ed.) Citation

Engler, A., and K. Krause. Araceae - Philodendroideae - Philodendreae. Wilhelm Engelmann, 1912.

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