APA (7th ed.) Citation

Gregory, P. H. (1974). Phytophthora disease of cocoa. Longman.

Chicago Style (17th ed.) Citation

Gregory, P. H. Phytophthora Disease of Cocoa. London: Longman, 1974.

MLA (9th ed.) Citation

Gregory, P. H. Phytophthora Disease of Cocoa. Longman, 1974.

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