SEMLER RICARDO. (2004). SEVEN DAY WEEKEND: BETTER WAY TO WORK IN THE 21ST CENTURY. ARROW BOOKS.
Chicago (17e ed.) BronvermeldingSEMLER RICARDO. SEVEN DAY WEEKEND: BETTER WAY TO WORK IN THE 21ST CENTURY. LONDON: ARROW BOOKS, 2004.
MLA (9e ed.) BronvermeldingSEMLER RICARDO. SEVEN DAY WEEKEND: BETTER WAY TO WORK IN THE 21ST CENTURY. ARROW BOOKS, 2004.
Let op: Deze citaties zijn niet altijd 100% accuraat.