APA

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

Chicago

Heys H L, . 1960. An introduction to electronic theory of organic compounds. London: George G. Harrap.

Harvard

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

MLA

Heys H L, . An introduction to electronic theory of organic compounds. London: George G. Harrap. 1960.