Cita APA (7a ed.)

ROMULO, C. P. The Challenges of the 80s. (s.e.).

Cita Chicago Style (17a ed.)

ROMULO, Carlos P. The Challenges of the 80s. (s.l.): (s.e.).

Cita MLA (9a ed.)

ROMULO, Carlos P. The Challenges of the 80s. (s.e.).