Gaya APA

Hamblin, W, , , , K., Howard, , J, , , , , D. (1971). Physical geology: Laboratory manual 3rd ed (1971). : USA: Burgess Publishing Company,.

Gaya MLA

Hamblin, W, , , , K., Howard, , J, , , , , D. "Physical geology: Laboratory manual 3rd ed". 1971 : USA: Burgess Publishing Company,, 1971. Text.