APA (7th ed.) Citation

Yearbook / The Cooperative League. . Co-op yearbook. Chicago, Ill., [etc.].

Chicago Style (17th ed.) Citation

Yearbook / The Cooperative League. . Co-op Yearbook. Chicago, Ill., [etc.].

MLA (8th ed.) Citation

Yearbook / The Cooperative League. . Co-op Yearbook. Chicago, Ill., [etc.].

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