Waller, F.G., author
Martinus Nijhoff, 1938
Buku Referensi
Martin, Judy, author
Running Press, 1993
Buku Referensi
Fadhlir Rahman Aufar Al-Fatah, author
Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Indonesia, 2023
UI - Tesis Membership
Untermeyer, Louis
Simon & Schuster, 1955
Buku Teks
Spiegelberg, Frederic, author
Pantheon Books, 1961
Buku Teks