APA (7th ed.) Citation

Bloom, W. W., & Krekeler, C. H. (1963). General biology: A unified text manual. D. Van Nostrand.

Chicago Style (17th ed.) Citation

Bloom, William W., and Carl H. Krekeler. General Biology: A Unified Text Manual. Princeton: D. Van Nostrand, 1963.

MLA (8th ed.) Citation

Bloom, William W., and Carl H. Krekeler. General Biology: A Unified Text Manual. D. Van Nostrand, 1963.