Quantitative naturalistic research;
an introduction to naturalistic observation and investigation
[by] John M. Butler, Laura N. Rice [and] Alice K. Wagstaff in collaboration with Sarah Counts Knapp.

APA Citation

Butler, J. M. (1963). Quantitative naturalistic research: an introduction to naturalistic observation and investigation. Englewood Cliffs, N.J.: Prentice-Hall.

MLA Citation

Butler, John M. Quantitative Naturalistic Research: an Introduction to Naturalistic Observation And Investigation. Englewood Cliffs, N.J.: Prentice-Hall, 1963.

Warning: These citations may not always be complete (especially for serials).