Mardiah, Mardiah and Somakim, Somakim and Purwoko, Purwoko and Hartono, Yusuf and Indaryanti, Indaryanti and Safitri, Meilani and Rinaldo, Rinaldo and Darmawijoyo, Darmawijoyo and Shahnaz, Shahnaz and Mulyono, Budi and Mustakim, Mustakim and Handayani, Yuni and Zulkardi, Zulkardi (2014) Edumat : jurnal edukasi matematika vol. 5 no. 10, November 2014. Direktorat Jenderal Guru dan Tenaga Kependidikan, Yogyakarta, pp. 631-688. ISBN 2087-0523