APA (7th ed.) Citation

Häcker, H., & Häcker, H. (1975). Objektive Testbatterie OA - TB 75: Manual. Beltz.

Chicago Style (17th ed.) Citation

Häcker, Hartmut, and Hartmut Häcker. Objektive Testbatterie OA - TB 75: Manual. Weinheim: Beltz, 1975.

MLA (8th ed.) Citation

Häcker, Hartmut, and Hartmut Häcker. Objektive Testbatterie OA - TB 75: Manual. Beltz, 1975.

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