Cita APA (7th ed.)

Gaspar, K., Graham, H. M., & Noonan, B. (1985). How long?: Prison reflections of Karl Gaspar. Claretian Publications.

Cita Chicago (17th ed.)

Gaspar, Karl, Helen M.M Graham, i Breda Noonan. How Long?: Prison Reflections of Karl Gaspar. Quezon City, Philippines: Claretian Publications, 1985.

Cita MLA (9th ed.)

Gaspar, Karl, et al. How Long?: Prison Reflections of Karl Gaspar. Claretian Publications, 1985.