Pile, John
Watson-Guptil, 1976
Buku Referensi
editor by Dabid A. Harris, Byron W. Engen and William E. Fitch
Van Nostrand Reinhold, 1991
Buku Teks
Apple, James MacGregor, 1915-1978
John Wiley & Sons, 1977
Buku Teks
Gersen Samuel Sumardi
Fakultas Teknik Universitas Indonesia, 2011
UI - Skripsi (Open)
designed and produced by serasia limited for asian productivity organization
Asian Productivity Organization , 1971
Buku Teks