Seiberling, Frank, author
A Holt-Dryden Book, 1959
Buku Teks
Alfarida Herlina, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2011
UI - Skripsi (Open)
Davies, Stephen, 1950-, author
Wiley Blackwell, 2016
Buku Teks
Cothey, A.L.
Routledge, 1990
Buku Teks
Heron, Patrick, author
Routledge & Kegan Paul, 1956
Buku Teks