Abdullahi Ahmad, PhD, and Kabiru Umar Jabaka, PhD,. “Electronic Spamming: The Use of Time Deixis As a Persuasive Tool by GSM Providers in Nigeria”. Liwuram - Journal for the Humanities, Vol. 19, no. 1, Nov. 2018, pp. 70 -78, http://journals.unimaid.edu.ng/index.php/liwuram/article/view/48.