APA (7th ed.) Citation

CURTIS, H. (1977). Invitation to Biology. Worth Publishers, Inc.

Chicago Style (17th ed.) Citation

CURTIS, Helena. Invitation to Biology. Worth Publishers, Inc, 1977.

MLA (8th ed.) Citation

CURTIS, Helena. Invitation to Biology. Worth Publishers, Inc, 1977.

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