APA (7th ed.) Citation

Eigen, L. D. (1962). A Comparison of three modes of presenting a programed instruction sequence. Center for Programed Instruction.

Chicago Style (17th ed.) Citation

Eigen, Lewis D. A Comparison of Three Modes of Presenting a Programed Instruction Sequence. N.Y.: Center for Programed Instruction, 1962.

MLA (8th ed.) Citation

Eigen, Lewis D. A Comparison of Three Modes of Presenting a Programed Instruction Sequence. Center for Programed Instruction, 1962.