Martin, S., & Layson, M. (2001). Mas mabigat na parusa, ipataw-Noli / Sammy Martin at Mer Layson. Kabayan.
Chicago Style aipamenaMartin, Sammy, and Mer Layson. "Mas Mabigat Na Parusa, Ipataw-Noli / Sammy Martin at Mer Layson." Kabayan 2001.
MLA aipamenaMartin, Sammy, and Mer Layson. "Mas Mabigat Na Parusa, Ipataw-Noli / Sammy Martin at Mer Layson." Kabayan, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.