Gaya APA

Brown, W, R. (). Physical science: a search for understanding Walter R. Brown; Norman ì D. Anderson . Philadelphia:: Philadelphia: J.B. Lippincott Company; 1972.

Gaya MLA

Brown, Walter, R.. "Physical science: a search for understanding Walter R. Brown; Norman ì D. Anderson". Philadelphia:: Philadelphia: J.B. Lippincott Company; 1972, . Text.