Omer Celik และ Wanchai Boonrod. (2015) The Relationship Between Service Marketing Mix and Customer Satisfaction in Commercial Fitness Centers in Bangkok Metropolis. Chulalongkorn University:ม.ป.ท.Omer Celik และ Wanchai Boonrod. 2015. The Relationship Between Service Marketing Mix and Customer Satisfaction in Commercial Fitness Centers in Bangkok Metropolis. ม.ป.ท.:Chulalongkorn University;Omer Celik และ Wanchai Boonrod. The Relationship Between Service Marketing Mix and Customer Satisfaction in Commercial Fitness Centers in Bangkok Metropolis. ม.ป.ท.:Chulalongkorn University, 2015. Print.