Cita APA (7th ed.)

Roberto, A. (1991). Understanding asthma / Ardy Roberto. Manila Times.

Cita Chicago (17th ed.)

Roberto, Ardy. "Understanding Asthma / Ardy Roberto." Manila Times 1991.

Cita MLA (9th ed.)

Roberto, Ardy. "Understanding Asthma / Ardy Roberto." Manila Times, 1991.

Atenció: Aquestes cites poden no estar 100% correctes.