APA

Cussler C., Dirgo C., . (2006). Sacred stone. London: Penguin.

Chicago

Cussler Clive, Dirgo Craig, . 2006. Sacred stone. London: Penguin.

Harvard

Cussler C., Dirgo C., . (2006). Sacred stone. London: Penguin.

MLA

Cussler Clive, Dirgo Craig, . Sacred stone. London: Penguin. 2006.