APA Citation

Grolier. (1970). Encyclopedia international. Volume XIX: Valhalla-zworykin. Grolier Incorporated.

Chicago Style Citation

Grolier. Encyclopedia International. Volume XIX: Valhalla-zworykin. Grolier Incorporated, 1970.

MLA Citation

Grolier. Encyclopedia International. Volume XIX: Valhalla-zworykin. Grolier Incorporated, 1970.

Warning: These citations may not always be 100% accurate.