Gaya APA
Koolhoven, H. (1941).
Dutch .
London:
Teach Yourself Books.
Gaya Chicago
Koolhoven, H.
Dutch.
London:
Teach Yourself Books,
1941.
Buku Teks.
Gaya MLA
Koolhoven, H.
Dutch.
London:
Teach Yourself Books,
1941.
Buku Teks.
Gaya Turabian
Koolhoven, H.
Dutch.
London:
Teach Yourself Books,
1941.
Buku Teks.