APA (7th ed.) Citation

Wong. (1990). Sleep without drugs. Pelanduk Pubs.

Chicago Style (17th ed.) Citation

Wong. Sleep Without Drugs. Petaling Jaya: Pelanduk Pubs, 1990.

MLA (8th ed.) Citation

Wong. Sleep Without Drugs. Pelanduk Pubs, 1990.

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