Cita APA (7th ed.)

HELMI, e. [. (1990). Pengobatan non-operatif otitis media supuratif. FKUI.

Cita Chicago (17th ed.)

HELMI, et.al. [ed.]. Pengobatan Non-operatif Otitis Media Supuratif. Jakarta: FKUI, 1990.

Cita MLA (9th ed.)

HELMI, et.al. [ed.]. Pengobatan Non-operatif Otitis Media Supuratif. FKUI, 1990.