APA (7th ed.) Citation

Weller, S. C., Romney, A., & Romney, A. K. (1988). Systematic data collection. Qualitative research methods.

Chicago Style (17th ed.) Citation

Weller, Susan C., Antone Romney, and Antone Kimball Romney. "Systematic Data Collection." Qualitative Research Methods 1988.

MLA (8th ed.) Citation

Weller, Susan C., et al. "Systematic Data Collection." Qualitative Research Methods, 1988.