Gotong royong / Heru Kurniawan, Endah Kusumaningrum; penyunting, Alf. Yogi S; ilustrator, Novel Varius - Heru Kurniawan (pengarang) ; Endah Kusumaningrum (pengarang) ; Alf. Yogi S (penyunting) ; Novel Varius (ilustrator) (Bhuana ilmu populer, 2018)