Fitria, Nita, 		Lidyana, Lynna, 		Iskandar, Shelly, 		Lubis, Leonardo, 		Fidella, Fidella, 		Fitria, Ajeng, AND 		Purba, Ambrosius.
"The Influence of Indonesian Cardio Gymnastic Series-I  to Plasma Protein Expression Of BDNF in The Elderly" <em>NurseLine Journal</em> [Online], Volume 4 Number 1 (4 July 2019)