<GROLIER INTERNATIONAL, I. Ilmu pengetahuan populer, vol. 6. Grolier International, Inc.
Chicago Style Citation<GROLIER INTERNATIONAL, Inc.>. Ilmu Pengetahuan Populer, Vol. 6. Grolier International, Inc.
MLA Citation<GROLIER INTERNATIONAL, Inc.>. Ilmu Pengetahuan Populer, Vol. 6. Grolier International, Inc.
Warning: These citations may not always be 100% accurate.