APA

HuprpY S., . (1997). The Achievement Zone : An 8_Step Guide To Peak Performance In All Arenas Of Life. New York: Berkley.

Chicago

HuprpY Shane, . 1997. The Achievement Zone : An 8_Step Guide To Peak Performance In All Arenas Of Life. New York: Berkley.

Harvard

HuprpY S., . (1997). The Achievement Zone : An 8_Step Guide To Peak Performance In All Arenas Of Life. New York: Berkley.

MLA

HuprpY Shane, . The Achievement Zone : An 8_Step Guide To Peak Performance In All Arenas Of Life. New York: Berkley. 1997.