APA (7th ed.) Citation

Allen, M., Gillespie, R., & Hayes, P. T. (1994). Essential elements for strings: A comprehensive string method. Hal Leonard.

Chicago Style (17th ed.) Citation

Allen, Michael, Robert Gillespie, and Pamela Tellejohn Hayes. Essential Elements for Strings: A Comprehensive String Method. Milwaukee: Hal Leonard, 1994.

MLA (9th ed.) Citation

Allen, Michael, et al. Essential Elements for Strings: A Comprehensive String Method. Hal Leonard, 1994.