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Hans, Jen Zainal Asyikin (2021) Tapping Solution Untuk Mengatasi Kecemasan Karena Covid-19. STIE IPWIJA, Jakarta. (Unpublished)
Sari, Nina Kemala and Hans, Jen Zainal Asyikin (2020) Life is so Good for Good People. Personal Development Training. ISBN 978-602-72016-6-8