APA (7th ed.) Citation

Petit-Maire, N., Page, N., & Marchand, J. (1993). The Sahara in the Holocene: Extant hyperarid area exclusively. Institut géographique national.

Chicago Style (17th ed.) Citation

Petit-Maire, N., Nicole Page, and J. Marchand. The Sahara in the Holocene: Extant Hyperarid Area Exclusively. Aix-en-Provence, France: Institut géographique national, 1993.

MLA (9th ed.) Citation

Petit-Maire, N., et al. The Sahara in the Holocene: Extant Hyperarid Area Exclusively. Institut géographique national, 1993.