Cita APA (7th ed.)

Laing, J. E. (1986). Periodic abstinence in the Philippines: New findings from a national survey. The Population Council.

Cita Chicago (17th ed.)

Laing, John E. Periodic Abstinence in the Philippines: New Findings from a National Survey. Bangkok: The Population Council, 1986.

Cita MLA (9th ed.)

Laing, John E. Periodic Abstinence in the Philippines: New Findings from a National Survey. The Population Council, 1986.