Não informado. (1969). Industrial and Commercial Training. J. Wellens, Industrial and Technical Training.
Style de citation Chicago (17e éd.)Não informado. Industrial and Commercial Training. Guilsborough, Inglaterra: J. Wellens, Industrial and Technical Training, 1969.
Style de citation MLA (8e éd.)Não informado. Industrial and Commercial Training. J. Wellens, Industrial and Technical Training, 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.