Sojak, Radoslaw, author
Internationaler Verlag der Wissenschaften, 2018
Buku Teks
Sojak, Radoslaw, author
Internationaler Verlag der Wissenschaften, 2018
Buku Teks
McGee, R. Jon, author
McGraw-Hill, 2012
Buku Referensi
Langness, L.L
Halt,Rinehart and Winston, 1965
Buku Teks
Pelto, Pertti J.
Harper & Row, Publishers, 1970
Buku Teks