APA (7th ed.) Citation

Purdy, L. (1919). Zoning as related to city planning: An address by Lawson Purdy. [publisher not identified].

Chicago Style (17th ed.) Citation

Purdy, Lawson. Zoning as Related to City Planning: An Address by Lawson Purdy. [Place of publication not identified]: [publisher not identified], 1919.

MLA (9th ed.) Citation

Purdy, Lawson. Zoning as Related to City Planning: An Address by Lawson Purdy. [publisher not identified], 1919.