Cita APA (7th ed.)

Heys, H. (1960). An introduction to electronic theory of organic compounds. George G. Harrap.

Cita Chicago (17th ed.)

Heys, H.L. An Introduction to Electronic Theory of Organic Compounds. London: George G. Harrap, 1960.

Cita MLA (9th ed.)

Heys, H.L. An Introduction to Electronic Theory of Organic Compounds. George G. Harrap, 1960.