Gaya APA

Burdick, D, L., Leffler, W, L. (1983). Petrochemicals for the nontechnical person. (1983). : Tulsa : PennWell Books,.

Gaya MLA

Burdick, Donald, L.., Leffler, William, L.. "Petrochemicals for the nontechnical person.". 1983 : Tulsa : PennWell Books,, 1983. Text.