Gaya APA

PRANCISCA, S. (2010). Optimizing problem-based learning to improve speaking competence of the elenventh year students of . : Universitas Sebelas Maret.

Gaya MLA

PRANCISCA, Stella. "Optimizing problem-based learning to improve speaking competence of the elenventh year students of". : Universitas Sebelas Maret, 2010. Thesis.