@article{ajewole1991,
  title={Effects of discovery and expository instructional methods on the attitude of students to biology},
  author={Gabriel Adeniyi Ajewole},
  year={1991},
  journal={Journal of Research in Science Teaching},
  doi={10.1002/tea.3660280504},
  url={https://doi.org/10.1002/tea.3660280504}
}