APA Style

Gunelius, S. (2018). Ultimate guide to email marketing for business : produce low-cost, high-impact email marketing campaigns, attract leads and turn them into customers, brand ambassadors, and revenue generators . Irvine, CA: Entrepreneur Press.

MLA Style

Gunelius, Susan. "Ultimate guide to email marketing for business : produce low-cost, high-impact email marketing campaigns, attract leads and turn them into customers, brand ambassadors, and revenue generators". Irvine, CA: Entrepreneur Press, 2018. .