APA (7th ed.) Citation

Steffen, H., & Geiser, U. (1978). Wādī Jawf, Yemen Arab Republic: Photomap = Wādī Ǧauf, al-Gumhūrīya al-ʿArabīya al-Yamanīya. Dept. of Geography of the University of Zurich.

Chicago Style (17th ed.) Citation

Steffen, Hans, and Urs Geiser. Wādī Jawf, Yemen Arab Republic: Photomap = Wādī Ǧauf, Al-Gumhūrīya Al-ʿArabīya Al-Yamanīya. Zürich: Dept. of Geography of the University of Zurich, 1978.

MLA (9th ed.) Citation

Steffen, Hans, and Urs Geiser. Wādī Jawf, Yemen Arab Republic: Photomap = Wādī Ǧauf, Al-Gumhūrīya Al-ʿArabīya Al-Yamanīya. Dept. of Geography of the University of Zurich, 1978.