Schmitten : H. & J. Schumacher AG, 1975
Buku Teks
Rousseau, Jean-Jacques, 1712-1778, author
Seghers , 1968
Buku Teks
E.K. Berndt [and others]
Hirschgraben, 1967
Buku Teks
Comite Maritime International, 1987
Buku Teks
Vivarini, I., author
Amilcare Pizzi,
Buku Referensi