Nida, W. L. (1926). Explorers and pioneers: I. Following Columbus. II. Following the frontier. The Macmillan Co..
Chicago-viite (17. p.)Nida, William Lewis. Explorers and Pioneers: I. Following Columbus. II. Following the Frontier. New York: The Macmillan Co., 1926.
MLA-viite (8. p.)Nida, William Lewis. Explorers and Pioneers: I. Following Columbus. II. Following the Frontier. The Macmillan Co., 1926.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.