Gaya APA

Heather, J., Mann, R. (2001). Stepping forward Jilid 4: Normal (Academic) . Singapura: SNP Pan Publishing.

Gaya MLA

Heather, Jones., Mann, Robyn. "Stepping forward Jilid 4: Normal (Academic)". Singapura: SNP Pan Publishing, 2001. Buku Penunjang.