APA (7th ed.) Citation

Perera, V. (1989). A Forest Dies in Guatemala. Nation, 249(15), 521.

Chicago Style (17th ed.) Citation

Perera, V. "A Forest Dies in Guatemala." Nation 249, no. 15 (1989): 521.

MLA (9th ed.) Citation

Perera, V. "A Forest Dies in Guatemala." Nation, vol. 249, no. 15, 1989, p. 521.