Cita APA (7a ed.)

(1993). Environmental synopsis: Sao Tome and Principe. IUCN : EC.

Cita Chicago Style (17a ed.)

Environmental Synopsis: Sao Tome and Principe. s.l.: IUCN : EC, 1993.

Cita MLA (9a ed.)

Environmental Synopsis: Sao Tome and Principe. IUCN : EC, 1993.