APA (7th ed.) Citation

Nilson, G., & Andrén, C. (1986). The mountain vipers of the Middle East - the Vipera xanthina complex (Reptilia, Viperidae).

Chicago Style (17th ed.) Citation

Nilson, Göran, and C. Andrén. The Mountain Vipers of the Middle East - the Vipera Xanthina Complex (Reptilia, Viperidae). Bonn, 1986.

MLA (9th ed.) Citation

Nilson, Göran, and C. Andrén. The Mountain Vipers of the Middle East - the Vipera Xanthina Complex (Reptilia, Viperidae). 1986.

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