Patel, M. (1986). Progress in English (Rev.ed.). Jyoti Bindu.
Chicago Style (17th ed.) ZitazioaPatel, M.S. Progress in English. Rev.ed. Nairobi: Jyoti Bindu, 1986.
MLA (9th ed.) ZitazioaPatel, M.S. Progress in English. Rev.ed. Jyoti Bindu, 1986.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.