Suhardianto. (2017). Berpikir singkat menguasai English speaking. Deepublish.
Chicago Style (17th ed.) CitationSuhardianto. Berpikir Singkat Menguasai English Speaking. Deepublish, 2017.
MLA (8th ed.) CitationSuhardianto. Berpikir Singkat Menguasai English Speaking. Deepublish, 2017.
Warning: These citations may not always be 100% accurate.