Kok Bisa Mengigau, ya?

3. Psychol, Front. (2013). the psychological functions of music listening. Diakses pada 13 agustus 2013, dari https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3741536/

4. Psychol, Front. (2017). The effect of diaphragmatic breathing on attention, negative affect and stress in healthy adults. Diakses pada 6 juni 2017, dari NCBI