APA (7th ed.) Citation

Grimwade, G. (2015). Mighty Mounds. dig into history, 17(8), 9.

Chicago Style (17th ed.) Citation

Grimwade, Gordon. "Mighty Mounds." Dig into History 17, no. 8 (2015): 9.

MLA (9th ed.) Citation

Grimwade, Gordon. "Mighty Mounds." Dig into History, vol. 17, no. 8, 2015, p. 9.