Cite
APA Citation
Lavrakas, P. J., Traugott, M. W., Leeuw, E. D. d., Kennedy, C., & Holbrook, A. L. (2019). Experimental methods in survey research : techniques that combine random sampling with random assignment. Hoboken, New Jersey : John Wiley & Sons, Inc. http://access.bl.uk/ark:/81055/vdc_100089595489.0x000001