Hawkins, C., & Sorgi, M. (1985). Research how to plan, speak and write about it. Narosa Publishing House.
Chicago Style aipamenaHawkins, Clifford, and Macro Sorgi. Research How to Plan, Speak and Write About It. NewDelhi: Narosa Publishing House, 1985.
MLA aipamenaHawkins, Clifford, and Macro Sorgi. Research How to Plan, Speak and Write About It. Narosa Publishing House, 1985.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.