Gaya APA
Rees, C, M, &, J. (2016).
Cambridge Primary Mathematics Skills Builder 2 (Cetakan pertama).
England:
Cambridge University Press.
Gaya MLA
Rees, Cherri, Moseley, &, Janet.
"Cambridge Primary Mathematics Skills Builder 2".
Cetakan pertama
England:
Cambridge University Press,
2016.
.