APA (7th ed.) Citation

Barbour, E. H. (1970). PL/I: A self-instructional manual. Macmillan.

Chicago Style (17th ed.) Citation

Barbour, Edna H. PL/I: A Self-instructional Manual. New York: Macmillan, 1970.

MLA (9th ed.) Citation

Barbour, Edna H. PL/I: A Self-instructional Manual. Macmillan, 1970.