APA (7th ed.) Citation

Heys, H. L. (1960). An introduction to electronic theory of organic compounds / by H.L. Heys. Harrap.

Chicago Style (17th ed.) Citation

Heys, H. L. An Introduction to Electronic Theory of Organic Compounds / by H.L. Heys. Harrap, 1960.

MLA (9th ed.) Citation

Heys, H. L. An Introduction to Electronic Theory of Organic Compounds / by H.L. Heys. Harrap, 1960.

Warning: These citations may not always be 100% accurate.