Cita APA (7th ed.)

Santos, R. E. (1956). Think of me for bass or mezzo-soprano. s.n.].

Cita Chicago (17th ed.)

Santos, Rosendo E. Think of Me for Bass or Mezzo-soprano. [London: s.n.], 1956.

Cita MLA (9th ed.)

Santos, Rosendo E. Think of Me for Bass or Mezzo-soprano. s.n.], 1956.