APA (7th ed.) Citation

Gilbert, D. (1972). Breaking the world barrier. Prentice-Hall.

Chicago Style (17th ed.) Citation

Gilbert, Doris. Breaking the World Barrier. Englewood Cliffs, N. J: Prentice-Hall, 1972.

MLA (9th ed.) Citation

Gilbert, Doris. Breaking the World Barrier. Prentice-Hall, 1972.