Wong. (1990). Sleep without drugs. Pelanduk Pubs.
Chicago Style (17th ed.) CitationWong. Sleep Without Drugs. Petaling Jaya: Pelanduk Pubs, 1990.
MLA (8th ed.) CitationWong. Sleep Without Drugs. Pelanduk Pubs, 1990.
Warning: These citations may not always be 100% accurate.