ETS Research Report Series · 1980 · 58 citations · 29 references
EducationEducational PsychologyLeadership CoachingCoach-athlete RelationshipsCoaching PsychologyInstructional CoachingJob CoachingPerformance CoachingCoach CompetenceCoach EffectivenessProfessional Development Of Coaches
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Donald B. Rubin · Biometrika · 1976 · 9.7K citations
The Handbook of Research on Teaching
David G. Ryans, N. L. Gage · Journal of Teacher Education · 1962 · 2K citations
Donald T. Campbell · American Psychologist · 1969 · 1.9K citations