Klaus Schubert, Paloma de Villota, Johanna Kuhlmann
Cham Springer International Publishing Springer, 2018
Buku Teks
Baumol, William J., author
Mass. Harvard University Press, 1952
Buku Teks
J.B. Lippincott Company, 1969
Buku Teks
Boumol, William J.
Harvard University Press, 1952
Buku Teks
Gordon, Scott
Columbia University Press, 1980
Buku Teks