APA (7th ed.) Citation

(1978). Oman in the twentieth century. Croom Helm [etc.].

Chicago Style (17th ed.) Citation

Oman in the Twentieth Century. Croom Helm [etc.], 1978.

MLA (8th ed.) Citation

Oman in the Twentieth Century. Croom Helm [etc.], 1978.

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