Cita APA (7th ed.)

Laurel, S. H. (1990). Sworn to serve. s.n.].

Cita Chicago (17th ed.)

Laurel, Salvador Hidalgo. Sworn to Serve. [S.l: s.n.], 1990.

Cita MLA (9th ed.)

Laurel, Salvador Hidalgo. Sworn to Serve. s.n.], 1990.