Gaya APA

Virdianka, R, A. (2019). Challenges Faced by Indonesian Export-Import Staffs Related to Their English Skills . Bogor: FKIP Unpak.

Gaya MLA

Virdianka, Rineke, Anggun/031113069. "Challenges Faced by Indonesian Export-Import Staffs Related to Their English Skills". Bogor: FKIP Unpak, 2019. Skripsi English.