The following databases are great places to start searching for information for your ASL research.
If you'd like to search a particular discipline specific ASL Journal there are many links available under the "ASL Conferences & Journals" tab that will take directly into that journal where you can conduct your search.
Find journal articles, conference papers, and books in the field of education. Coverage includes all levels of education from early childhood to higher education, and all educational specialties, such as multilingual education, health education, and testing. Some full-text available.
Designed for professional educators, this database provides a highly specialized collection of nearly 520 high quality education journals, including more than 350 peer-reviewed titles.
In addition to these books listed below, AAHE also has a series focused on service learning across the disciplines. The entire series in the UW System can be viewed here, The Center for Academic Service learning also has selected titles.
Writing the Community: Concepts and Models for Service-Learning in Composition by 
Learning Through Serving by 
Service-Learning and the Liberal Arts: How and Why It Works by 
Service-Learning in Higher Education: Critical Issues and Directions by 
Service-Learning in Theory and Practice: The Future of Community Engagement in Higher Education by 