Ullmann, Manfred
Islamic surveys
Edinburgh University Press, 1978
 Buku Teks
Indra Freddy
Pengaruh belanja melalui internet terhadap kepuasan konsumen dalam melakukan belanja melalui internet = Effect analysis of online shopping to satisfaction consumers in doing online shopping
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
 UI - Skripsi (Membership)
Grundy, Peter F.
Doing pragmatics
Edward Arnold, 1995
 Buku Teks
Marion Wesley Todd
Engineering surveys elementary
Macmillan, 1934
 Buku Teks
Hyman, Herbert H.
Secondary analysis of sample surveys
John Wiley & Sons, 1972
 Buku Teks