APA-viite (7. p.)

Pena, N. (1982). Philippine law on natural resources (1982 rev. ed.). Rex Book Store.

Chicago-viite (17. p.)

Pena, Narciso. Philippine Law on Natural Resources. 1982 rev. ed. Manila: Rex Book Store, 1982.

MLA-viite (9. p.)

Pena, Narciso. Philippine Law on Natural Resources. 1982 rev. ed. Rex Book Store, 1982.