Hovland, C. I. and Lumsdaine, A. A.. "INTRODUCTION TO PART I". Experiments on Mass Communication, Princeton: Princeton University Press, 1971, pp. 19-20. https://doi.org/10.1515/9781400886807-003
Hovland, C. & Lumsdaine, A. (1971). INTRODUCTION TO PART I. In Experiments on Mass Communication (pp. 19-20). Princeton: Princeton University Press. https://doi.org/10.1515/9781400886807-003
Hovland, C. and Lumsdaine, A. 1971. INTRODUCTION TO PART I. Experiments on Mass Communication. Princeton: Princeton University Press, pp. 19-20. https://doi.org/10.1515/9781400886807-003
Hovland, C. I. and Lumsdaine, A. A.. "INTRODUCTION TO PART I" In Experiments on Mass Communication, 19-20. Princeton: Princeton University Press, 1971. https://doi.org/10.1515/9781400886807-003
Hovland C, Lumsdaine A. INTRODUCTION TO PART I. In: Experiments on Mass Communication. Princeton: Princeton University Press; 1971. p.19-20. https://doi.org/10.1515/9781400886807-003