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.