Cita APA (7a ed.)

Nichols, J., & Mellinger, M. (2007). Portals for Undergraduate Subject Searching: Are They Worth It?

Cita Chicago Style (17a ed.)

Nichols, Jane, y Margaret Mellinger. Portals for Undergraduate Subject Searching: Are They Worth It? 2007.

Cita MLA (9a ed.)

Nichols, Jane, y Margaret Mellinger. Portals for Undergraduate Subject Searching: Are They Worth It? 2007.