Research carried out by research by means of in-depth interviews (In-depth Interview) with the main information that is related to market research by Pink has chosen as the sample provides information for specific Purposive Sampling (the main.
The researcher conducted research using in-depth interviews (In-depth Interview) on the primary market, which is associated with pink. The research sample was selected as the primary placement (Purposive Sampling.
The researcher conducting research using depth interviews with key informants In-depth Interview) ที่มีความเกี่ยวข้อง with fresh pink. The researcher choose subjects as key informants specific models (Purposive Sampling.