John E. Borland. Modern teaching in the senior school: Nature study science. George Newnes.
Cita Chicago (17th ed.)John E. Borland. Modern Teaching in the Senior School: Nature Study Science. London: George Newnes.
Cita MLA (9th ed.)John E. Borland. Modern Teaching in the Senior School: Nature Study Science. George Newnes.
Atenció: Aquestes cites poden no estar 100% correctes.