APA

BERGGREN J., . (1982). Al-Bîrûnî on plane maps of the sphere. : .

Chicago

BERGGREN J.L, . 1982. Al-Bîrûnî on plane maps of the sphere. : .

Harvard

BERGGREN J., . (1982). Al-Bîrûnî on plane maps of the sphere. : .

MLA

BERGGREN J.L, . Al-Bîrûnî on plane maps of the sphere. : . 1982.