Gaya APA
Company, I., M., B. (1960).
McGraw-Hill Encyclopedia of Science and Technology 5 ent - fus .
USA:
McGraw-Hill Book Company.
Gaya MLA
Company, I., M., B..
McGraw-Hill Encyclopedia of Science and Technology 5 ent - fus.
USA:
McGraw-Hill Book Company,
1960.
Lawas.