Dinda Dea Pramaputri
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2018
UI - Skripsi Membership
Pressley, Michael
Guilford Press, 2007
Buku Teks
Cohen, David
Routledge Press, 2002
Buku Teks SO
edited by Ross Vasta
Jessica Kingsley, c1992
Buku Teks
Faller, Kathleen Coulborn
Columbia University Press, 1988
Buku Referensi