APA (7th ed.) Citation

Bloom, W. W., & Krekeler, C. (1963). General biology, a unified text manual. D. van Norstrand Comp.

Chicago Style (17th ed.) Citation

Bloom, William W., and C.H Krekeler. General Biology, a Unified Text Manual. D. van Norstrand Comp, 1963.

MLA (8th ed.) Citation

Bloom, William W., and C.H Krekeler. General Biology, a Unified Text Manual. D. van Norstrand Comp, 1963.

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