APA (7th ed.) Citation

United States. Department of Commerce. (1930). Supplemental index to No. 198. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Department of Commerce. Supplemental Index to No. 198. [Washington]: [publisher not identified], 1930.

MLA (9th ed.) Citation

United States. Department of Commerce. Supplemental Index to No. 198. [publisher not identified], 1930.

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