APA (7th ed.) Citation

Wellman, F. L. (1972). Tropical american plant disease: Neotropical phytopathology problems. The Scarecrow.

Chicago Style (17th ed.) Citation

Wellman, Frederick L. Tropical American Plant Disease: Neotropical Phytopathology Problems. Nueva York: The Scarecrow, 1972.

MLA (9th ed.) Citation

Wellman, Frederick L. Tropical American Plant Disease: Neotropical Phytopathology Problems. The Scarecrow, 1972.