Sabin A. WLL Liam. (2005). Gregg reference manual: The easy way! Mcgraw - Hill Irwin.
Chicago Style aipamenaSabin A. WLL Liam. Gregg Reference Manual: The Easy Way! Mcgraw - Hill Irwin, 2005.
MLA aipamenaSabin A. WLL Liam. Gregg Reference Manual: The Easy Way! Mcgraw - Hill Irwin, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.