Gaya APA
Kernkamp, G.
(1901).
Over Robert Fruin, I. Byvanck over Fruin, II. Fruin-studies.
.
Utrecht:
Kemink.
Gaya MLA
Kernkamp, G.W..
"Over Robert Fruin, I. Byvanck over Fruin, II. Fruin-studies. ".
Utrecht:
Kemink,
1901.
Buku.