Iskandar, J., and S. Syueb. “The Effect of Interpersonal Communication and Group Communication on Group Cohesiveness at Persebaya Korwil Suramadu Supporters”. Ultimacomm: Jurnal Ilmu Komunikasi, Vol. 9, no. 2, Aug. 2018, pp. 90-9, doi:https://doi.org/10.31937/ultimacomm.v9i2.812.