Nik Syahrudin Nik Daud, Mohd. Mustamam Abd. Karim, Nor Lelawati Hassan, and Nurulhuda Abdul Rahman, “Kajian keberkesanan prinsip momentum-impuls bagi mata pelajaran Fizik SPM: A study on the effectiveness of the momentum–impulse principle in SPM Physics”, JPP, vol. 6, no. 1, pp. 95–105, Dec. 2015.