APA (7th ed.) Citation

Courtenay, A. (1990). Natural sleep : how to beat insomnia without drugs / Anthea Courtenay: How to beat insomnia without drugs. Thorsons.

Chicago Style (17th ed.) Citation

Courtenay, Anthea. Natural Sleep : How to Beat Insomnia Without Drugs / Anthea Courtenay: How to Beat Insomnia Without Drugs. Wellingborough: Thorsons, 1990.

MLA (9th ed.) Citation

Courtenay, Anthea. Natural Sleep : How to Beat Insomnia Without Drugs / Anthea Courtenay: How to Beat Insomnia Without Drugs. Thorsons, 1990.

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