Greenwich, C. (2000). THE FUN FACTOR: GAMES, SALES CONTESTS, ACTIVITY MAKE WORK FUN & RESULTS. Mc Graw-Hill Australia.
Chicago (17e ed.) BronvermeldingGreenwich, Carolyn. THE FUN FACTOR: GAMES, SALES CONTESTS, ACTIVITY MAKE WORK FUN & RESULTS. Mc Graw-Hill Australia, 2000.
MLA (8e ed.) BronvermeldingGreenwich, Carolyn. THE FUN FACTOR: GAMES, SALES CONTESTS, ACTIVITY MAKE WORK FUN & RESULTS. Mc Graw-Hill Australia, 2000.
Let op: Deze citaties zijn niet altijd 100% accuraat.