APA

DAVIDSON H. A., . (1979). Avicenna's proof of the existence of God as a necessarily existent being. Albany: State university of New York Press.

Chicago

DAVIDSON Herbert A, . 1979. Avicenna's proof of the existence of God as a necessarily existent being. Albany: State university of New York Press.

Harvard

DAVIDSON H. A., . (1979). Avicenna's proof of the existence of God as a necessarily existent being. Albany: State university of New York Press.

MLA

DAVIDSON Herbert A, . Avicenna's proof of the existence of God as a necessarily existent being. Albany: State university of New York Press. 1979.