Gaya APA
LUCK, G. et al
(1992).
HENKEL-REFERATE 28
(
International Edition)
.
Dusselfdorf:
Henkel.
Gaya MLA
LUCK, Gisela. et al.
"HENKEL-REFERATE 28".
International Edition
Dusselfdorf:
Henkel,
1992.
Textbook.