As everyone above has stated, doing a poem is not advisable if you're doing Immigrant Chronicle. The syllabus for AOS states that you should explore representations of belonging (obviously, not quoted word for word) and therefore, using different textual forms will allow you to address this part a lot more effectively.
If you're planning on doing a different form of poetry (for example, Shakespeare's sonnets or Tennyson's dramatic monologues) it would likely work out, but you'd have to explore the different poetic/rhythm techniques and conventions (which is a bitch) in order to clearly show the difference in the textual forms.
More importantly however, make sure that whatever related text you use can easily compare and contrast with the themes of Immigrant Chronicle in order to write a properly synthesised response. E.g the importance of belonging to family, culture and the dissonance that migrants feel in a new country.