The heaven makers

MLA

Herbert, Frank, John Schoenherr and Mark B. Adams Science Fiction Collection (University of Pennsylvania). The heaven makers. New York : Avon Books, 1968.

APA

Herbert, F., Schoenherr, J. & Mark B. Adams Science Fiction Collection (University of Pennsylvania). (1968). The heaven makers. New York : Avon Books.

Chicago

Herbert, Frank, John Schoenherr and Mark B. Adams Science Fiction Collection (University of Pennsylvania). The heaven makers. New York : Avon Books, 1968.