APA
Armour R., . (1972). It all started with columbus. New York: Bantam Books.
Chicago
Armour Richard, . 1972. It all started with columbus. New York: Bantam Books.
Harvard
Armour R., . (1972). It all started with columbus. New York: Bantam Books.
MLA
Armour Richard, . It all started with columbus. New York: Bantam Books. 1972.