APA

Nobilis research group, . (1995). General Knowledge encyclopedia. Beirut: Nobilis.

Chicago

Nobilis research group, . 1995. General Knowledge encyclopedia. Beirut: Nobilis.

Harvard

Nobilis research group, . (1995). General Knowledge encyclopedia. Beirut: Nobilis.

MLA

Nobilis research group, . General Knowledge encyclopedia. Beirut: Nobilis. 1995.