Gaya APA

Kelestarian Alam. (1981). Hoboken, NJ: Pastel.

Gaya Chicago

Kelestarian Alam. . Hoboken, NJ: Pastel, 1981. Text.

Gaya MLA

Kelestarian Alam. . Hoboken, NJ: Pastel, 1981. Text.

Gaya Turabian

Kelestarian Alam. Hoboken, NJ: Pastel, 1981. Print.