Lipson, Leslie, author
Prentice-Hall, 1960
Buku Teks
Lipson, Leslie, author
Prentice-Hall, 1954
Buku Teks
Ethridge, Marcus E., author
Wadsworth and Cengage Learning, 2013
Buku Teks
Devina Ayona, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2020
UI - Tugas Akhir
Madgwick, P.J., author
Stanley Thornes, 1992
Buku Teks