APA Citation

Chen, & Chen. (1989). The essence and scientific background of tongue diagnosis =. Long Beach, CA: Oriental Healing Arts Institute.

Chicago Style Citation

Chen, and Chen. The Essence and Scientific Background of Tongue Diagnosis =. Long Beach, CA: Oriental Healing Arts Institute, 1989.

MLA Citation

Chen, and Chen. The Essence and Scientific Background of Tongue Diagnosis =. Long Beach, CA: Oriental Healing Arts Institute, 1989.

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