APA
Weller S. C., Romney A. K., . (1988). Systematic data collection. London: SAGE Publications.
Chicago
Weller Susan C, Romney A Kimball, . 1988. Systematic data collection. London: SAGE Publications.
Harvard
Weller S. C., Romney A. K., . (1988). Systematic data collection. London: SAGE Publications.
MLA
Weller Susan C, Romney A Kimball, . Systematic data collection. London: SAGE Publications. 1988.