APA (7th ed.) Citation

Altena, M., & Elk, G. v. (1999). Horizon. Bifrons Stichting.

Chicago Style (17th ed.) Citation

Altena, Maarten, and Ger van Elk. Horizon. Amsterdam: Bifrons Stichting, 1999.

MLA (9th ed.) Citation

Altena, Maarten, and Ger van Elk. Horizon. Bifrons Stichting, 1999.

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