MLA

Ricky Lam, and Ricky Lam. Portfolio Assessment for the Teaching and Learning of Writing. Springer Singapore, 2018.

APA

Ricky Lam, R. Lam, & Lam, R. (2018). Portfolio Assessment for the Teaching and Learning of Writing. Springer Singapore.

Chicago

Ricky Lam, and Ricky Lam. Portfolio Assessment for the Teaching and Learning of Writing. : Springer Singapore, 2018.