Schofield, W.B.
Introduction to bryology
Blackburn Press, 1985
Buku Teks
Introduction to .....
Buku Teks
Framkin
An Introduction to .........
Buku Teks
Steidel, Robert F.
An Introduction to.......
Buku Teks
Giddens, Anthony
Introduction to sociology
W.W. Norton & Compan, 2005
Buku Teks