Zalukhu, Atalisi, et al. “Improving The Students’ Speaking Ability In Giving Suggestions And Advice By The Use Of ‘Whip Around’ Strategy In The Second Grade Of SMA Negeri 8 Medan”. Jurnal Pendidikan Dan Konseling (JPDK), vol. 5, no. 4, Aug. 2023, pp. 423-30, doi:10.31004/jpdk.v5i4.17638.