SARI, Estika.
 THE EFFECTIVENESS OF TEACHING SPEAKING BY USING WHATSAPPS OF TENTH GRADE STUDENTS AT MAN 4 KEDIRI.
<strong>Jurnal Pendidikan Bahasa Inggris Proficiency</strong>, [S.l.], v. 1, n. 1, p. 1-11, jan. 2019.
ISSN 2775-0450.
Available at: &lt;<a href="https://ejournal.uniska-kediri.ac.id/index.php/PROFICIENCY/article/view/694" target="_new">https://ejournal.uniska-kediri.ac.id/index.php/PROFICIENCY/article/view/694</a>&gt;. Date accessed: 25 apr. 2025.
doi: <a href="https://doi.org/10.32503/proficiency.v1i1.694">https://doi.org/10.32503/proficiency.v1i1.694</a>.