Gaya APA

Leeuwen, A, T, , , , ). (-1972). Critique of heaven. Gifford Lectures 1970: mengenai K.Marx. . New York: Scribner's.

Gaya MLA

Leeuwen, Arend, Th.van.(1918-, , , , ). "Critique of heaven. Gifford Lectures 1970: mengenai K.Marx. ". New York: Scribner's, -1972. Buku.