APA
Robertie B., . (2004). 501 Essential Backgammon Problems. : Cardoza.
Chicago
Robertie Bill, . 2004. 501 Essential Backgammon Problems. : Cardoza.
Harvard
Robertie B., . (2004). 501 Essential Backgammon Problems. : Cardoza.
MLA
Robertie Bill, . 501 Essential Backgammon Problems. : Cardoza. 2004.