APA (7th ed.) Citation

Ellis, D. K., Halley, M. E., & Hauge, R. C. (1971). BASE: Basic approach to the structure of English. Individualized Instruction Inc..

Chicago Style (17th ed.) Citation

Ellis, Donald K., Mildred E. Halley, and Robert C. Hauge. BASE: Basic Approach to the Structure of English. [Oklahoma City]: Individualized Instruction Inc., 1971.

MLA (8th ed.) Citation

Ellis, Donald K., et al. BASE: Basic Approach to the Structure of English. Individualized Instruction Inc., 1971.