APA

Byford-Jones W., . (1967). Four faces of Peru. New York : Roy Publishers, Inc: .

Chicago

Byford-Jones W, . 1967. Four faces of Peru. New York : Roy Publishers, Inc: .

Harvard

Byford-Jones W., . (1967). Four faces of Peru. New York : Roy Publishers, Inc: .

MLA

Byford-Jones W, . Four faces of Peru. New York : Roy Publishers, Inc: . 1967.