<https://www.cambridge.org/education/subject/science/biology?format=&isbn=9781107614963>
<http://schema.org/author>
<https://www.cambridge.org/pl/education/subject/science/biology/cambridge-igcse-biology-3rd-edition/cambridge-igcse-biology-3rd-edition-teachers-resource-cd-rom?format=CM&isbn=9781107614963>