APA引文

Smith, E. S. C., & International Cocoa Research Conference. (1981). The interrelationships between shard types and cocoa pest and disease problems in Papua New Guinea. [s.n.].

Chicago Style (17th ed.) Citation

Smith, E. S. C., and International Cocoa Research Conference. The Interrelationships Between Shard Types and Cocoa Pest and Disease Problems in Papua New Guinea. [S.l.]: [s.n.], 1981.

MLA引文

Smith, E. S. C., and International Cocoa Research Conference. The Interrelationships Between Shard Types and Cocoa Pest and Disease Problems in Papua New Guinea. [s.n.], 1981.