Theory, Practice, and Trends in Human Services: An Introduction 6th Edition is written by Edward S. Neukrug and published by Cengage Learning.ISBNs for Theory, Practice, and Trends in Human Services: An Introduction are 9798214354927, and 9781305271494, 1305271491. Additional ISBNs for this book include 9781337478199, 9781305856011, 9781337219778, 9781305857575, 9781305930377.