If a reference does not list an author, use the article title in the author position
Drought tolerance in crop plants can conserve water, energy. (2008, January 9). Southeast Farm Press. p. 4.
If a reference has between 2 and 7 authors, list each name in the order it appears on the source.
Cortés, A. J., Monserrate, F. A., Ramírez-Villegas, J., Madriñán, S., & Blair, M. W. (2013). Drought tolerance in wild plant populations: The case of common beans (Phaseolus vulgaris L.). Plos ONE, 8(5), 1-10. doi:10.1371/journal.pone.0062898
8 or More Authors
If a reference has 8 or more authors, list the first 6 names followed by an ellipses and the final name listed.
Marcolino-Gomes, J., Rodrigues, F., Fuganti-Pagliarini, R., Bendix, C., Nakayama, T., Celaya, B., & ... Nepomuceno, A. (2014). Diurnal oscillations of soybean circadian clock and drought responsive genes. Plos ONE, 9(1), 1-13. doi:10.1371/journal.pone.0086402
If a reference was authored by a company, organization, or other group, use the group’s formal name.
Pew Center on Global Climate Change. (2010). The case for action: Creating a clean energy future. Retrieved from http://www.issuelab.org/resource/case_for_action_creating_a_clean_energy_future