APA (7th ed.) Citation

Hopf, A., & Hopf, A. (1978). Alte Exlibris. Harenberg.

Chicago Style (17th ed.) Citation

Hopf, Andreas, and Angela Hopf. Alte Exlibris. Dortmund: Harenberg, 1978.

MLA (9th ed.) Citation

Hopf, Andreas, and Angela Hopf. Alte Exlibris. Harenberg, 1978.

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