The skilled helper : a problem-management and opportunity-development approach to helping

Developing helping skills: a step-by-step approach to competency

Hubungan antara nilai individual kebajikan dengan tingkah laku menolong: dimediasi oleh komitmen organisasi afektif = Relationship between individual value benevolence with helping behavior: mediated by affective organizational commitment

Social treatment : an approach to interpersonal helping

Pengaruh nilai ekosentrisme terhadap perilaku pro-lingkungan : sebuah studi pada mahasiswa Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia = The effect of ecocentrism value on pro-environmental behaviour : a tudy on undergraduate students of the Faculty of Social and Political Sciences at University of Indonesia, Depok