Penampakan Teori pada Riset Kualitatif
Levels of theoretical visibility typology Caroline Bradbury-Jones, Julie Taylor, and Oliver Herber, “How Theory Is Used and Articulated in Qualitative Research: Development of a New Typology,” Social Science and Medicine 120 (2014): 135–141, http://dx.doi.org/10.1016/j.socscimed.2014.09.014.