Peoples, James G., author
Cengage Learning, 2018
Buku Teks
Dinda Aramitha Wahyu Safitri, author
Fakultas Psikologi Universitas Indonesia, 2020
UI - Tesis (Membership)
The Modern Language Association of America, 1985
Buku Teks
Harden, Ronald M., author
Churchill Livingstone, 2012
Buku Teks
Rahmi Septiani Putri, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2015
UI - Skripsi (Membership)